Life
This is the smallest unit of life
Cell
The number of protons plus the number of neutrons of an element
atomic mass
This molecule is known as the universal solvent
water
Pure water has a pH of what value on the pH scale
7
This element is found in all organic matter
The process of maintaining a constant internal environment is known by this term
Homeostasis
The strongest and most common type of bond, formed when two atoms share electrons
covalent bond
Water molecules climbing up a straw due to their attraction to the straw is an example of this property
adhesion
A solution with a pH of 3 is classified as what type of substance
an acid
These are the building blocks of carbohydrates
monosaccharides
This is made up of cells that are similar in structure and function
Tissue
A variant form of an element that has the same number of protons but differs in the number of neutrons
isotope
The process where water molecules escape as water vapor, cooling an organism
evaporation
Acids are substances that provide this ion to lower the pH
hydrogen ions
These are the building blocks of proteins
amino acids
The group that goes through all the steps of the experiment but is not exposed to the experimental variable
control group
When an atom has an unequal number of protons and electrons, it becomes one of these
ion
Water is a polar molecule due to an uneven distribution of electrons, resulting in a slight negative charge on this atom
oxygen
Buffers play a key role in maintaining what in the body
pH
This is the only vitamin that can be made in our cells
vitamin D
The branch of biology concerned with identifying, naming, and classifying organisms
Taxonomy
The weak electrical attraction between a hydrogen atom and a neighboring atom with a slight negative charge
hydrogen bond
Water is known as the universal solvent because it can form hydrogen bonds with these types of molecules
polar molecules
A change of two units on the pH scale represents a change in the concentration of hydrogen ions by a factor of what?
100
This carbohydrate is used to store excess glucose for later use in animals
glycogen